General public could care less if all of the X-Men gets the right amount of screentime. 1 X-Men movie that is not a spin-off or a prequel per 3 years would be enough for them. Like I said they are not get much that success if they keep focusing on prequel and spin-off movies. They need to go back to the original series since its the one that worked well with the audience and at the box-office the most.